HELLER, Michał. The existence of singularities and the origin of space-time. Philosophical Problems in Science (Zagadnienia Filozoficzne w Nauce), [S. l.], n. 43, p. 35–43, 2008. DOI: 10.59203/zfn.43.232. Disponível em: https://www.zfn.edu.pl/index.php/zfn/article/view/232. Acesso em: 26 nov. 2025.